The consideration of what may be called the mythical period of Mexican history is rendered all the more difficult by the fact that all the legends have been collected among later immigrants who wished as far as possible to trace some connection between themselves and the earlier settlers. Toltec descent, if it could be established, raised a family at once to a patrician status, and most of the immigrant tribes sought their rulers among the descendants of a Toltec house. There is therefore the danger of fictitious genealogies, such as exist among so many Sudanese tribes desirous of proving “Arab” descent; but apart from this we are confronted at the outset with a difficulty which is not easy of solution. Sahagun states that the first inhabitants, the Toltec, the other Nahua, the Olmec and the Michoacans, arrived at the Panuco valley and worked down the east coast before turning inland. Ixtlilxochitl represents the Toltec as coasting down lower California and Jalisco. Of the two writers Sahagun is by far the more trustworthy, but at the same time it is difficult to see what Ixtlilxochitl had to gain by deliberately transferring the scene of the migration from one coast to the other. The story of Sahagun is, in brief, as follows. The migrants penetrated as far as Guatemala, and then settled for a time at a place called Tamoanchan, mention of which occurs in nearly all migration legends. Here the wise men who led them departed, taking the god under whose guidance they travelled and the picture-writings which contained their lore, and sailing eastward over the sea. The rest remained behind, under the governance of certain lesser sages, of whom the chief were Oxomoco and Cipactonal, “awaiting the dawn for the administration of society.” The Olmec also split from the main stem at this point. From here the others went to Xomiltepec, and then to Teotihuacan, a site remarkable for extensive pre-Aztec ruins, where they elected rulers, and then to Coatepec, where the Otomi branched off. Later the tribes who still remained associated foregathered at Chicomoztoc, another locality mentioned in nearly all the myths, where they established cave-temples. Hence the Toltec departed to Tulanzinco, and subsequently to Tulan; after they had separated, the Tarascans also split off, finding their way to Michoacan. Later still the Nahua, including the Tepanec (founders of Azcapotzalco), the Acolhua (of Tezcoco), and the eventual populations of Chalco, Uexotzinco and Tlaxcala respectively. The Aztec alone remained wandering in the northern steppes until they too eventually reached the valley of Mexico. It is hardly worth while entering into the details of Toltec history as recorded subsequent to their settlement; the “Annals of Quauhtitlan,” a native tradition of considerable age and value, gives a list of five kings; Torquemada and Ixtlilxochitl furnish an entirely different list, the latter mentioning one king in addition to those quoted by Torquemada.